ROUGH START: Bobby Valentine’s Red Sox are in last place as Yankees arrive in Boston today.AP

Who feels like celebrating?

The Red Sox will honor the 100-year anniversary of Fenway Park today with the Yankees in town, but the mood around the team has felt more like a funeral.

Boston has lost three straight since new manager Bobby Valentine alienated his players by publicly questioning the hustle of Kevin Youkilis and comes into the three-game set with their rivals in last place in the AL East at 4-8.

“You knew he was going to stir things up; that’s his nature,” YES Network analyst Ken Singleton said of Valentine. “It doesn’t surprise me, some of those things are going to happen with Bobby V. Things are going to get shaken up one way or the other. One thing I do feel is that when the manager loses the trust of his players, it’s very tough to get it back. They are really going to have to win a lot of games and that gets every one feeling good.”

Youkilis defended himself, as did Dustin Pedroia, who said “that’s not the way we go about our stuff around here.”

How do the Red Sox go about their stuff?

“The thing I had a problem with is if the manager has a problem with a player and is not producing on the field the way you want him to, or is not hustling, then it is a one-on-one conversation behind the scenes,” said MLB Network analyst Kevin Millar, who played for the Red Sox from 2003-’05. Millar will be on the MLB Network’s “Intentional Talk” live from Fenway at 1 p.m. before joining the pregame ceremony.

“I wasn’t a big fan of Valentine going public with that … And in the future do it privately, so it doesn’t snowball on the team like this.”

The Yankees have not had any off-the-field controversies yet, but can relate to the Red Sox’s on-the-field struggles. Boston has had to deal with their woeful bullpen after closer Andrew Bailey had thumb surgery just before the season that will sideline him for the four months. The Yankees’ problem has been getting the ball to their bullpen.

“That’s the Yankees’ weakness,” Millar said of their shaky starting rotation. “If there is a loose piece for the Yankees it’s definitely not their bullpen or their offense, either. You hear about age and all that, but I don’t want to hear that. Derek Jeter is Derek Jeter, period. The Yankees are building for a championship, not to win 93-94 games, and they have to figure out who are the guys they want starting in those playoff games.”

Reinforcements are on the way, though. Michael Pineda, who is recovering from a sore shoulder, and the un-retired Andy Pettitte are expected to join the rotation sometime in May, which means two members of the Yankees rotation could be forced out. Phil Hughes and Freddy Garcia, who starts tomorrow against the Red Sox, are the most likely to receive a demotion, but have a few more starts to prove themselves irreplaceable.

“When Pettitte’s ready, he’s going to replace somebody, “ Singleton said. “I think they do feel the pressure. . .. I was willing to give Garcia a pass in his first start in Baltimore because he’s a touch-and-feel pitcher and it was real cold that night. His next start at Yankee Stadium, maybe not so much, but he did progress a little bit.”